/**
 * Software License, Version 1.0
 * 
 * Copyright 2003 The Trustees of Indiana University.  All rights reserved.
 * 
 *
 *Redistribution and use in source and binary forms, with or without 
 *modification, are permitted provided that the following conditions are met:
 *
 *1) All redistributions of source code must retain the above copyright notice,
 * the list of authors in the original source code, this list of conditions and
 * the disclaimer listed in this license;
 *2) All redistributions in binary form must reproduce the above copyright 
 * notice, this list of conditions and the disclaimer listed in this license in
 * the documentation and/or other materials provided with the distribution;
 *3) Any documentation included with all redistributions must include the 
 * following acknowledgement:
 *
 *"This product includes software developed by the Community Grids Lab. For 
 * further information contact the Community Grids Lab at 
 * http://communitygrids.iu.edu/."
 *
 * Alternatively, this acknowledgement may appear in the software itself, and 
 * wherever such third-party acknowledgments normally appear.
 * 
 *4) The name Indiana University or Community Grids Lab or NaradaBrokering, 
 * shall not be used to endorse or promote products derived from this software 
 * without prior written permission from Indiana University.  For written 
 * permission, please contact the Advanced Research and Technology Institute 
 * ("ARTI") at 351 West 10th Street, Indianapolis, Indiana 46202.
 *5) Products derived from this software may not be called NaradaBrokering, 
 * nor may Indiana University or Community Grids Lab or NaradaBrokering appear
 * in their name, without prior written permission of ARTI.
 * 
 *
 * Indiana University provides no reassurances that the source code provided 
 * does not infringe the patent or any other intellectual property rights of 
 * any other entity.  Indiana University disclaims any liability to any 
 * recipient for claims brought by any other entity based on infringement of 
 * intellectual property rights or otherwise.  
 *
 *LICENSEE UNDERSTANDS THAT SOFTWARE IS PROVIDED "AS IS" FOR WHICH NO 
 *WARRANTIES AS TO CAPABILITIES OR ACCURACY ARE MADE. INDIANA UNIVERSITY GIVES
 *NO WARRANTIES AND MAKES NO REPRESENTATION THAT SOFTWARE IS FREE OF 
 *INFRINGEMENT OF THIRD PARTY PATENT, COPYRIGHT, OR OTHER PROPRIETARY RIGHTS. 
 *INDIANA UNIVERSITY MAKES NO WARRANTIES THAT SOFTWARE IS FREE FROM "BUGS", 
 *"VIRUSES", "TROJAN HORSES", "TRAP DOORS", "WORMS", OR OTHER HARMFUL CODE.  
 *LICENSEE ASSUMES THE ENTIRE RISK AS TO THE PERFORMANCE OF SOFTWARE AND/OR 
 *ASSOCIATED MATERIALS, AND TO THE PERFORMANCE AND VALIDITY OF INFORMATION 
 *GENERATED USING SOFTWARE.
 */
package cgl.narada.jms;

import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;

import javax.jms.Message;

/**
   This class implements a specialized logger that is used to keep a log
   of the JMS messages that are published or received at a client. This is
   used primarliy for debugging purposes, especially during porting 
   applications written based on a different JMS provider.

   @author Shrideep Pallickara
   $Revision$
   $Date$
*/

public class JmsLogger implements JmsDebugFlags {
  private boolean loggerInitialized=false;
  private BufferedWriter out;
 
  public JmsLogger(String logFileName) {
   
    try {
      out = 
	new BufferedWriter(new OutputStreamWriter(new FileOutputStream(logFileName)));
      loggerInitialized = true;
      if (JmsLogger_Debug) {
	System.out.println("The JMS Logger has been initialized");
      } 
    } catch (FileNotFoundException fnfe) {
      fnfe.printStackTrace();
      System.out.println("JmsLogger:: Error Initializing file" + logFileName);
    }
  }
  
  
  public void logPublishedMessage(Message jmsMessage) {
    writeToFile("Published Message" + jmsMessage.toString() + "\n");
  }
  
  public void logSubscription(String subscription) {
    writeToFile(subscription + "\n");
  }
  
  public void logReceivedMessage(Message jmsMessage) {
    writeToFile("Received Message" + jmsMessage.toString() + "\n");
  }

  private void writeToFile(String stringMessage) {
    if (!loggerInitialized) {
      System.out.println("The Log file has not been initialized");
      return;
    }
    stringMessage += "\n";
    try {
      out.write(stringMessage, 0, stringMessage.length());
      out.flush();
    } catch (IOException ioEx) {
      System.out.println("JmsLogger::Error writing to file");
    }
  }

  public static void main(String[] args) {
    JmsLogger logger = new JmsLogger("anabasLogger.txt");
    logger.logSubscription("Jordan and the Wizards will rule");
    logger.logSubscription("Yankees rule");
  }

}



